名词
中文翻译：轴
同义词：
['pivot', 'axis of rotation', 'axis of revolution']
例句：
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1. The car's steering wheel is on the left side, and the gearshift lever is on the right.
汽车的方向盘在左边，换挡杆在右边。
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2. This machine has an axis that runs through its center.
这台机器有一个穿过中心的轴。
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3. The molecule's axis is perpendicular to the plane of the paper.
这个分子的轴与纸面垂直。